Has anyone else been messaged/contacted by this person, or gotten similar requests? I have no intention of sharing private info about the game (and I'm slightly annoyed by their last message, which is rather pushy).

I'd also like to say: PLEASE DO NOT BOTHER THIS PERSON. I have no interest in starting a fight on Twitter, and I don't want anyone to harass or accuse them. I just want the mods to know about this, in case anyone else has gotten similar messages. Thank you.

Oh, I haven't heard about this before, and this username doesn't actually follow my Twitter account. If he or she ever contacts you again, perhaps refer him or her to the Kickstarter update? (since I do share my monthly updates to public, and info regarding beta and stuff can actually be seen there )